The Rawlins Area is a iron mine located in Carbon county, Wyoming.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
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Rawlins Area MRDS details
Site Name
Primary: Rawlins Area
Secondary: Unnamed Mine
Secondary: Rawlins Iron Deposits
Secondary: Rawlins Paint Ore
Secondary: Rawlins Hematite
Secondary: Paint Mine
Commodity
Primary: Iron
Location
State: Wyoming
County: Carbon
District: Rawlins Area
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Owner Name: Union Pacific Railroad
Percent: 100.0
Home Office: Nebraska
Info Year: 1976
Production
Year: 1890
Time Period: pre 1890
Material type: 100,000 tons ore produced. Estimated 1,000,000 tons remaining.
Deposit
Record Type: Deposit
Operation Category: Past Producer
Operation Type: Surface-Underground
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Wyoming Basin
Mineral Deposit Model
Not available
Orebody
Form: POD-SHAPED MASSES AND LENSES
Structure
Type: L
Description: E-Ne Striking Cross Faults
Alterations
Not available
Rocks
Name: Limestone
Role: Host
Age Type: Host Rock
Age Young: Mississippian
Name: Limestone
Role: Host
Age Type: Host Rock Unit
Age Young: Mississippian
Analytical Data
Analytical Data: AN AVERAGE OF 9 ASSAYED CARLOADS OF ORE GAVE THE FOLLOWING RESULT: FE = 64.94%, SIO2 = 3.16%, P2O5 = 0.013%, SO3 = 0.011%, CAO = 1.46%, CO2 = 2.84%
Materials
Ore: Azurite
Ore: Hematite
Gangue: Quartz
Gangue: Calcite
Trace: Malachite
Unknown: Brochantite
Trace: Olivenite
Trace: Chrysocolla
Trace: Chalcocite
Comments
Comment (Production): Production to 1890 estimated to be about 100,000 tons. Little has been produced since 1890. (Bull. 50, p. 111)
Comment (Workings): SOME PITS AND AT LEAST ONE SHAFT
Comment (Deposit): From Bull. 50, p. 110-111: "...the richest ore is found in pockets, pod-shaped masses, lenses, and otehr irregularly shaped masses iwthin a shaly limestone bed. Some of the masses were more than 20 ft in length. The ore replaced rock within a closely restricted stratigraphic horizon, and the masses are probably bedding plane deposits. The hematite is variable; some is massive, hard, and blue material, and some is partly granular and earthy."
Comment (Reserve-Resource): Inferred reserves estimated to be 1,000,000 tons (Bull 50, p. 111).
Comment (General): Red paint from this deposit was known as the Rawlins Red and was used to paint the Brooklyn Bridge in 1883.
Comment (Reference): Merged record 10157055 (MAS 0560070097) referenced Berry, 1960, USGS Water Supply Paper 1458. However ABW was unable to find any mention of this ore deposit in that paper and therefore removed it from the references cited list.
Comment (Deposit): Merged record 10157055 (MAS 0560070097) says "The ore occurs as a filling in solution chambers of a subsurface drainage system. Orientation of chambers is along NE trend. Ore would probably be best utilized as pigmentation agent or [dri]lling mud component. (Both are previous useages)."
Comment (Deposit): This record is not a single site record, but it is a larger area of perhaps 6 sq. miles. In sec. 31 T21N, R87W and secs. 4, 5, 8, 9, T22N, R87W.
Comment (Orebody): Description of Ore body in 10157055 (MAS 0560070097) included the following info under MAS Matrix: Type of Orebody #1: Sedimentary Shape of Orebody #1: Irregular Shape of Orebody #2: Lenticular Primary Mode of Origin: Sedimentation Secondary Mode of Origin: Residual Concent Primary Ore Control: Bedding Secondary Ore Control: Faulting Degree of Wallrock Alter.: None Type of Wallrock Alter: : None Type of Wallrock Alter. #1: unknown Strike and Dip: N50E, 60N Minimum Depth to Top: 0 Avg. Thick. Unconsol. Mat. : 0 Min. Thick Unconsol. Mat.: 0 Total Surface Area (HA): 64.7 Date of Last Modification: 780213 All other orebody information is from this same record.
Comment (Deposit): Merged record 10157055 (MAS 0560070097) listed Mn, Phosphorus-Phosphates, Silica, and Sulfur as trace commodities. There is no evidence these are anything but geochemical analyses reported in Bull. 50, p. 111.
Comment (Ownership): Ownership info from Merged record 10157055 (MAS 0560070097) .
Comment (Geology): "Several small deposits of hematite in sandstone (Cambrian) capped by limestone (Madison) are loated 2 mi. north of Rawlins." (Bull. 50, p. 110)
Comment (Deposit): Deposits associated with cross faults contain malachite, azurite, etc.
References
Reference (Deposit): Lovering, 1929, The Rawlins, Shirley, and Seminoe iron-ore deposits, Carbon Co., Wy: USGS Bull. 811-D, p. 209-216.
Reference (Deposit): Harrer, 1966, Wyoming Iron-ore deposits: USBM IC-8315, p. 19-20.
Reference (Deposit): Osterwald and others, 1966, Mineral Resources of Wyoming: Geological Survey of Wyoming Bull. 50 [revised ed.], p. 110-111
Reference (Deposit): Osterwald and others, 1959, Mineral Resources of Wyoming: Geological Survey of Wyoming Bull. 50, p. 101.
Reference (Deposit): Boyle, A.C., (1923), Report on the Rawlins, Wyoming iron ore deposits: unpublished typewritten report in Geol. Surv. Wyo. files, 14 p. (referenced in Bull. 50 and Bull. 811-D).
Reference (Deposit): Barlow, J.A., 1953, Geology of the Rawlins Uplift, Carbon Co., Wy: Univ. of Wyoming PhD dissertation.
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